Hacksaw-machine.



M. H. JOHNSON.

' HACKSAW MAGHINE. urnronron rum 11.411,29, 19o?. I y

Patented Aug. 16,1910.

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M. H. JOHNSON.

HAGKSAW MACHINE. APPLICATION FILED 1113.29. 19o?.

Patented Aug. 16,1910.

3 SHEETS-SHEET 2.

M. BE. JOHNSON. HAGKSAW MACHINE. APPLICATION FILEDl'IAB. 39, 1907. 967,640. Patented Aug. 16,1910.

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Aful Improvement in Hacksaw-Machines, of

mechanism of simple construction for auto- A chine which is upright and comparatively ranged vises or holders of any suitable con- `end to the base of the frame by a bolt b3;

UNiTEn sTATEs PATENT OEEIOE.

MARQUIS I-I. JOHNSON, OF BUFFALO, NEVI YORK, ASSIGNOR TO BUFFALO SPECIALTY COMPANY, OF BUFFALO, NEW YORK, A CORPORATION 0F `NFIVIJ YORK.

HAcKsAw-MAOHINE. i

To all whom it may concern:

Be it known that I, MARQUIS II. JOHNSON, a citizen of the United States, residing at Buiialo, in the county of Erie and State. of New AYork, have invented a new and usewhich the following is a specification.

This invention relates to that class ofsaw ing machines employed principally for severing rods and other metal stock and commonly known as hack-saw machines.

One of the objects of the invention is the production of a simple and compact duplex sawing machine of this character by which stock of dili'erent kinds or sizes can be operated upon at the same time. ,j

`Further objects are to render the saw frames adjustable in a convenient manner to accommodate saws of different lengths; to provide the machine with a reliable trip matically throwing the saws out of gear with the driving mechanism when the bars or other objects have been severed, and to improve the machine in other respects with a view of increasing its etliciency.

In the accompanying drawings consisting of 3 sheets: Figure l is a side elevation of the machine showing one of the saws lowered and the other raised. Fig. 2 is a top plan view thereof. Fig. 3 is a transverse section in line BH3, Fig. l. Fig. 4 is a horizontal section in line 4 4, Fig. 1. Fig. 5 is a fragmentary top plan view of one of the upright rock levers and the corresponding coupling link and trip lever. Fig. 6 is a transverse section in line 6 6, Fig. 5.

Similar letters of reference indicate correi sponding parts throughout the several views.

A indica-tes the main frame `of the manarrow.

At opposite ends of the Jframe are ar struction :for holding the rods, bars or other 1 stock to be sawed. Each of the vises shown in the drawings consists of a fixed jaw orabutment Z9 preferably cast integral with the main frame; a horizontal guide or table B removably secured at its inner end to the base of the iixed jaw by bolts b1 or otherl fastenings and supported at its outer end by l' a `brace b2 removably secured at its lower Specification of Letters Patent.

Application filed March 29,

Patented Aug. 16, 1910. 1907. serial No. 365,354.

and an outer movable jaw b4 mounted on the table B and operated by a suitable adjusting screw b5.

C indicates the driving shaft journaled in bearings c supported on the frame and having a crank c1.

I), D indicate the saws arranged at opposite ends of the machine above the vises and mounted in reciprocating saw-frames arranged side by side lengthwise of the machine. Each of these frames consists of parallel upper and lower rodse, e1 and cross heads `or pieces f, f1 connecting the same and having eyes or `sockets f2 in which the rods are clamped by bolts f3. The upper rod of each saw-frame extends forwardly beyond the lower rod and terminates in a depending arm e2, which carries the clamping screw g connected with the front end of the corresponding saw D.` The rear end of the saw is removably attached to the lower end of the front cross piece )il by a transverse pin or other suitable means. As shown in Fig. l, the cross pieces 7, f1 extend below the lower rods c1 of the saw frame.

H, I-I indicate a'pair of standards arranged one in front of the other on top of the frame A, the central portion of the latter which carries these standards being preferably depressed below the level of the viseguides B, as shown in Fig. l. The lower rod c1 of each saw frame and the portion of its upper rod c between the cross pieces f, f1 slidein front and rear guides or boxes J1., 71 the two rear boxes being mounted at opposite ends oit' anupright rock lever L-l pivoted on the adjacent standard I-I and the two front boxes on a similar lever h2 pivoted in a vertically-movable slide I guided on the other standard, so that each saw frame while free to reciprocate in said boxes can also swing vertically at its front end to lower the saw to its operative position, as shown at the left of Fig. 1, or to raise it to an inoperative position, as shown at the right of said figure. As the saw frames face outwardly in opposite directions, each of the standards I-I carries on o-ne side the swiveling rear bearing-boxes L of one sawframe and the carrying-slide I of the front boxes 7b2 of the other saw frame, as best shown in Fig. 3. These slides are retained upon the standards by lips 1I secured `to their opposite sides and embracing the edges of 4of at j. T

the standards, as shown in Fig. 2, or by other suitable means.

J, J indicate a pair of upright rockv arms or levers arranged on opposite sides of the frame and ivoted to the base member thereliese levers are independently actuated from the crank of the main shaft C by pitmen la, c which are preferably made adjustable toward and from the fulcra of the levers by bolts icl passing through longitudinal slots 702 in the levers. The upper portions of these levers are arranged between the standards I-I and the saw frames are respectively connected with their upper ends by coupling rods or links L. Each of these links is pivoted at its rear end to the lower end of the rear cross piece f of the corresponding Saw frame, while its front end is preferably detachably connected to the companion rock lever by providing the link with a downwardly-opening notch Z adapted to engage a cross pin Z1 carried by the bifurcated upper end o-f the lever.

m, m indicate vertically -swinging triplevers cooperating respectively with the coupling links L and pivoted at m1 to the inner sides of horizontal supporting bars or brackets m2 carried by the standards H.L

In 'the construction shown in the drawings, the rear arms of these trip-levers are bent upwardly and terminate in lips m3 which engage under the coupling links, as shown in Figs. l, 2 and 5, so that when their front arms are depressed they swing the links upwardly out of engagement with the rock levers J.

n, n are spring catches for locking the inner arms of the trip levers m in their elevated position. Each of these catches consists of an elastic arm or shank secured at its rear end to the bracket m2 and provided at its free front end with an inwardly-extending pin or projection nl which passes through an opening in said bracket. In the normal position of each trip lever, its rear arm is depressed and the pin n? of the corresponding spring rcatch bears against the side of the lever, straining the spring-arm of the catch, but when the rear arm of the lever is raised, the pin springs under the lever and locks it in that position. The spring catches are provided with fingerloops n2 to permit their easy withdrawal for releasing the trip levers;

Each of the slides I carries a suitable tappet o arranged to engage the front arm of the corresponding trip lever m immediately after the corresponding saw has severed the rod or other article placed in the vise. Each tappet is preferably made vertically adjustable by means of a clamping screw passing through a vertical slot 0? in its shank, as shown in Figs. 1 and 3, whereby the tappet can be adjusted to trip the lever J at a higher or lower point in the descent of the saw, according to the diameter of the bars to be sawed.

Suitable means are provided for supporting the saws in their raised position while placing the articles in the vises. The devices preferred for this purpose consist of latches p pivoted at their lower ends to the standards H and having shoulders p1 adapted to engage under the lower ends of the slides, as shown in connection with the right-hand slide in Fig. l. To lower the saws, the latches are swung down to the position shown at the left of Fig. l.

As shown in the drawings, the saw frames are arranged closely together to render the machine narrow and compact, and each frame terminates short of the vise with which the saw of the other frame coperates.

In the operation of the machine, the bars to be severed are clamped in the vises, the coupling rods L are connected with the rock levers J, and the saws are lowered upon the bars. Upon driving the machine, the two saw-frames are reciprocated as hereinbefore described. The saw frames gradually descend by gravity, and ilnmediately after the saws have severed the bars, the tappets a trip the levers m, lifting the links L out of engagement with the rock levers J and stopping the saws, the links being held in their disconnected position by the automatic catches fn. As both saws are driven by a single crank shaft, the construction is simplified accordingly.

By locating the actuating devices, such as the rock levers J, J, at or near the middle of the machine and connecting the saw frames therewith at a point between the ends of said frames, a very compact construction is obtained which renders the machine lnuch shorter than it would be if the rear ends of the. saw frames were connected directly to said levers. The bolt-and-slot connection between the pitmen 7c and the rock levers J, permits the stroke of the saws to be varied, according to the requirements of diii'erent kinds of work. Upon loosening the clamping bolts of the upper rods e of the saw frames, these rods may be adjusted lengthwise in the cross pieces f, f1 to suit saws of different lengths.

By making the vise-tables B, braces b2 and movable vise-jaws b4 detachable, as hereinbefore described, these parts can be detached to enable pieces of work to be sawed which are too large to enter between the jaws. After removing said parts such large pieces are suitably clamped against the fixed jaw b or the end of the main frame.

I claim as my invention:

l. In a sawing machine, the combination of a main frame, work-holders arranged at opposite ends of the frame, saw-frames arranged above said work-holders respectively, a driving shaft, and separate actuating connections between the saw frames and the driving shaft, substantially as set forth.

2. In a sawing machine, the combination of a main. frame, work-holders arranged at opposite ends of the frame, saw-frames arranged above said worloholders, respectively, a driving shaft having a pair of cranks, and separate driving connections between said cranks and said saw-frames, substantially as set forth.

In a sawing machine, thecombination of a main frame, a reciprocating vertically movable saw-frame guided thereon, a rocklever pivoted to the main frame below the saw frame, means for actuating said lever, a coupling link attached at one end to the saw frame and having its opposite end detacliably connected to said lever, and a trip device acting on said link and arranged to be engaged by means vertically-movable with the saw frame, substantially as set forth.

4. In a sawing machine, the combination of a main frame, a reciprocating, verticallymovable sawframe guided thereon, a tappet connected with said saw-frame, an actuating member, a coupling link detachably connecting the saw-frame with said actuating member, and a trip lever arranged to engage said link and separate the same from the actuating member and located in the path of said tappet, substantially as set forth.

5. In a sawing machine, the combination of a main frame, a pair of standards mounted thereon one in front of the other, a vertically-movable slide guided on one of said standards and carrying a tappet, a reciprocating saw frame guided in said slide and pivotally supported on the other standard, an actuating member, a detachable connection between said actuating member and the saw-frame, and a trip lever disposed to act on said connection and arranged in the path of said tappet, substantially as set forth.

(3. In a sawing machine, the combination of a main frame, a reciprocating, verticallymovable saw-frame guided thereon, a tappet connected with said saw-frame, an actuating member, a coupling link detachably connecting the saw-frame with said actuating member, a trip lever arranged to engage said link and separate the same from the actuating member and located in the path of said tappet, and automatic locking means for retaining said lever in its tripped position, substantially as set forth.

7. In a sawing machine, the combination of a main frame, a reciprocating, verticallymovable saw-frame guided thereon, a tappet connected with said saw-frame, an actuating member, a detachable connection between said actuating member and the saw-frame, a vertically-swinging trip-lever disposed to act on said connection and arranged in the path of said tappet, and a spring catch consisting of an elastic arm having a projection adapted to engage under the triplever, substantially as set forth.

8. In a sawing-machine, the combination of a stationary frame, a pair of standards mounted thereon one in front of the other, a vertically-movable slide guided on one of saidstandards, a reciprocating sav-frame having its front portion supported on said slide and its rear portion pivotally mounted on the other standard, and means for actuating the saw-frame, substantially as set forth.

9. In a sawing-machine, the combination .of a stationary frame,` a pair of standards mounted thereon one in front of the other, a swiveling guide mounted on one of said standards, a vertically movable slide mounted on the other standard and carrying a swiveling guide, a saw-frame arranged in said swiveling guides, and means for reciprocating the sawframe, substantially as set forth.

l0. In a sawing-machine, the combination of a stationary frame, a pair of standards mounted thereon one in front of the other,

`an upright rock-lever pivoted to one of said standards and provided on opposite sides of its fulcrum with guides, a verticallymovable slide mounted on the other standard and carrying a similar rock lever with guides, a saw-frame including a pair of longitudinal rods sliding in the upper and lower guides of said rock-levers, and means for reciprocating the saw-frame, substantially as set forth.

11. In a ,sawing machine, the combination of a main frame, work-holders arranged at opposite ends thereof, a pair of reciprocating saw-frames arranged side by side lengthwise of the machine, the outer or front portions of the saweframes being located above the work-holders, respectively, and the rear end of each frame terminating short of the holder with which the other saw-frame cooperates, substantially as set forth.

12. In a sawing machine, the combination of a main frame, a pair of oppositely-facing saw-frames supported thereon and arranged side by side lengthwise of the machine, the outer or Vfront portion of each saw-frame extending beyond the rear end of the other, and means for reciprocating the saw-frames, substantially as set forth.

13. In a sawing-machine, the combination of a stationary frame, a pair of standards mounted thereon one in front of the other, a pair of saw-frames.supported side by side on said standards, the outer or front portion of each saw-frame extending beyond the rear portion of the other, and means for reciprocating the saW frames, substantially as set forth.

14. In a sawing-machine, the combination of a stationary frame, a pair of standards mounted thereon one in front of the other, a pair of saw-frames supported side by side on said standard, the outer or front portion of each saw-frame extending beyond the rear portion of the other, and actuating means for the saw-frames located between said standards, substantially as set forth.

15. In a sawing-machine, the combination of a stationary frame, a pair of standards mounted thereon one 1n front of the other,

'a pair of saw-frames supported side by side on said standard, the outer or front portion of each saw-frame extending beyond the rear portion of the other, rock levers pivoted to the main frame and extending up- Wardly between said standards, connections extending from said rock levers to the rear portions of the respective saw-frames, and means for actuating said rock levers, substantially as set forth.

16. In a sawing-machine, the combination of a main frame, a pair of standards mounted thereon one in front of the other, and each having on one side a svviveling guide and on its opposite Side a verticallymovable slide carrying a similar guide, and

a pair 0f saw-frames arranged side by side and each mounted in a pair of said front and rear guides arranged on the same side of the tvvo standards, and means for reciprocating the saw-frames, substantially as set forth.

17. In a sawing-machine, the combination of a main frame and a saw-frame guided thereon and comprising upper and' lower longitudinal rods, cross pieces connecting said rods and having sockets which receive the same, the upper rod extending beyond the front cross piece and being provided at its front end with a downwardl 7-extending arm, and means for adjustably clamping the upper rod in said sockets, substal'itially as set forth.

1S. In a sawing-machine, the combination of a main frame provided at its end with a fixed vise-jaw, a table removably secured to the base of said jaw, a movable jaw mounted on said table opposite the fixed jaw, a brace supporting the outer end of the table and detachably secured to the main frame, and a saw arranged above said table, substantially as set forth.

Vitness my hand this 20th day of March,

MARQUIS II. JOHNSON. IVitnesses O. F. GEYER, E. M. GRAHAM. 

